WO2018040419A1 - Video playing method and apparatus for curved-surface television - Google Patents

Abstract

Disclosed is a video playing method for a curved-surface television, comprising the steps of: detecting a distance and a deviation angle between a target object and the curved-surface television; according to a relationship between the distance and a pre-set watching distance, adjusting the resolution of a playing picture of the curved-surface television; adjusting a deviation ratio of the playing picture according to the deviation angle; and according to a relationship between the distance and a pre-set sound effect distance, adjusting the audio playing sound track. Also disclosed is a video playing apparatus for a curved-surface television. The present invention implements the automatic adjusting of, according to changes in the distance and/or deviation angle between a target object and a curved-surface television, the resolution and a deviation ratio of a playing picture of the curved-surface television, and/or the audio playing sound track, thus implementing information interaction between the curved-surface television and a user, and improving the sense of presence of a user when watching a movie.

Description

 Surface television video playing method and device

Technical field

The present invention relates to the field of curved television technology, and in particular, to a curved television video playing method and apparatus.

Background technique

With the continuous development of science and technology, electronic technology has also developed rapidly, and there are more and more types of electronic products. People also enjoy the convenience brought by the development of science and technology. Among them, the appearance of curved TV has attracted people's eager attention. Due to the change of curvature on the screen, the curved TV makes the viewers have the same distance from each pixel when watching TV, eliminating the visual distortion of the edge of the screen, having a wider viewing angle, more comfortable viewing experience for the human eye, and realistic presence. It can create the most natural and comfortable look and many other advantages, making curved TV gradually become the mainstream choice of most families.

In real life, the world that human beings perceive is three-dimensional. The picture and sound that humans perceive will change as the human position moves. Virtual reality devices often simulate real-world scenarios based on this principle, giving users an immersive experience. However, most of the virtual devices on the market currently need to wear heavy glasses, and the imaging point of the device is very close to the eyeball. Long-term viewing will cause fatigue and even cause unhealthy effects on the body.

According to the law of human body vision, when an object is closer to the human eye, the object has a higher percentage of the human eye visual image, and vice versa. When the user's eye visual direction shifts to the left, the user generally wants to pay attention to the visual image. On the left side of the content, if the details of the left side are displayed in more detail, the user's visual experience will be improved. However, the existing curved TV cannot adjust the resolution and angle of the video playback screen according to the user's position and visual angle, and needs to be further improved in terms of the field appearance of the painting.

The above content is only used to assist in understanding the technical solutions of the present invention, and does not constitute an admission that the above is prior art.

Summary of the invention

The main object of the present invention is to provide a method and a device for playing a curved TV video, which aims to solve the problem that the existing curved TV can not adjust the resolution, angle and audio track of the video playback screen according to the user's position and visual angle. .

To achieve the above objective, a curved television video playing method provided by the present invention includes the following steps:

Detecting the distance and deviation angle of the target object from the curved TV;

Adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance; and

Adjusting an offset ratio of the playback screen according to the deviation angle; and

The audio track is adjusted according to the relationship between the distance and the preset sound effect distance.

Preferably, the step of detecting a distance and a deviation angle of the target object from the curved television comprises:

Sending a test signal to the wireless earphone worn by the target object through the curved television, and receiving the feedback response signal and the visual angle information;

Calculating a total time that the surface television sends the test signal to receive the response signal;

Calculating the distance according to the total time and the speed of the test signal and the response signal transmission;

Calculating a deviation angle between the target object and the curved television according to the visual angle information and the television angle information of the curved television.

Preferably, the step of adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance comprises:

Determining a vertical resolution of the playback picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determining a horizontal resolution of the playback picture according to a relationship between the horizontal resolution and the vertical resolution;

Adjust the resolution of the surface TV playback screen according to the vertical resolution and horizontal resolution of the playback screen.

Preferably, the step of adjusting the offset rate of the play picture according to the deviation angle comprises:

Determining the offset rate of the playback screen according to the deviation angle, the horizontal resolution of the playback picture, and the horizontal resolution of the video stream;

The offset rate of the playback picture is adjusted according to the offset rate.

Preferably, the step of adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance comprises:

The closer the target object is to the curved TV, the larger the content displayed on the playback screen, and the farther the target object is from the curved TV, the more images are displayed in the playback screen.

Preferably, the step of adjusting the audio track played according to the relationship between the distance and the preset sound effect distance comprises:

When the range of the best sound effect distance between the target object and the curved TV is changed, the audio track is switched by the track volume gradient.

Preferably, the method further includes:

When the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or the deviation angle of the current detection and the deviation angle of the previous detection is greater than or equal to the preset angle value, , keeping the resolution and offset rate of the current playback picture unchanged;

When the distance between the detected distance and the previous detected distance is less than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the current detection The distance and deviation angle adjust the resolution and offset rate of the playback screen.

Preferably, the time interval of the resolution and/or the offset rate of the curved television playback picture is adjusted.

In addition, in order to achieve the above object, the present invention further provides a curved TV video playing device, including:

a detecting module, configured to detect a distance and a deviation angle of the target object from the curved television;

An adjustment module, configured to adjust a resolution of the surface television broadcast screen according to the relationship between the distance and the preset viewing distance; and

Adjusting an offset ratio of the playback screen according to the deviation angle; and

The audio track is adjusted according to the relationship between the distance and the preset sound effect distance.

Preferably, the detecting module comprises:

a signal unit, configured to send a test signal to the wireless headset worn by the target object through the curved television, and receive the feedback response signal and the visual angle information;

a calculating unit, configured to calculate a total time that the curved television sends the test signal to receive the response signal; and

Calculating the distance according to the total time and the speed of the test signal and the response signal transmission; and

Calculating a deviation angle between the target object and the curved television according to the visual angle information and the television angle information of the curved television.

Preferably, the adjustment module comprises:

a determining unit, configured to determine a vertical resolution of the play picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determine a horizontal resolution of the play picture according to a relationship between the horizontal resolution and the vertical resolution;

The adjustment unit is configured to adjust the resolution of the surface television playback screen according to the vertical resolution and the horizontal resolution of the playback screen.

Preferably, the determining unit is further configured to determine an offset rate of the play picture according to the deviation angle, the horizontal resolution of the play picture, and the horizontal resolution of the video code stream;

The adjusting unit is further configured to adjust an offset rate of the play picture according to the offset rate.

Preferably, the adjustment module is further configured to make the target object closer to the curved TV, and the content displayed in the play screen is larger, and the farther the target object is from the curved TV, the more images are displayed in the play screen.

Preferably, the adjusting module is further configured to perform audio track switching by using a track volume gradation when a range of an optimal sound effect distance of the target object and the curved television is changed.

Preferably, the adjusting module is further configured to: when the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or the deviation angle of the current detection and the deviation angle of the previous detection When the change value is greater than or equal to the preset angle value, the resolution and the offset rate of the current playback picture are kept unchanged;

When the distance between the detected distance and the previous detected distance is less than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the current detection The distance and deviation angle adjust the resolution and offset rate of the playback screen.

Preferably, the adjustment module is further configured to adjust a time interval of a resolution and/or an offset rate of the curved television playing screen.

The invention detects the distance and the deviation angle of the target object from the curved television; adjusts the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance; and adjusts the offset rate of the playing screen according to the deviation angle; The distance from the preset sound effect adjusts the audio track. When the distance and/or the deviation angle of the target object and the curved TV are changed, the resolution, the offset rate and/or the audio track of the curved television playing screen are automatically adjusted, so that the information communication between the curved television and the user is realized, and the user is improved. The sense of presence of the movie.

DRAWINGS

1 is a schematic flow chart of a first embodiment of a method for playing a curved television video according to the present invention;

2 is a schematic diagram showing the refinement process of an embodiment of step S10 in FIG. 1;

3 is a schematic diagram of a target object wearing a wireless earphone to watch a curved television;

4 is a schematic diagram of a video stream and a curved television playing screen;

FIG. 5 is a schematic diagram showing the refinement process of an embodiment of step S20 in FIG. 1;

FIG. 6 is a schematic diagram showing the refinement process of an embodiment of step S30 in FIG. 1;

7 is a schematic flow chart of a second embodiment of a method for playing a curved television video according to the present invention;

8 is a schematic diagram of functional modules of a preferred embodiment of a curved television video playback device of the present invention;

9 is a schematic diagram of a refinement function module of an embodiment of the detection module of FIG. 8;

FIG. 10 is a schematic diagram of a refinement function module of an embodiment of the adjustment module of FIG. 8. FIG.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The main solution of the embodiment of the present invention is: detecting a distance and a deviation angle between the target object and the curved television; adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance; and adjusting the playing screen according to the deviation angle The offset rate of the audio is adjusted according to the relationship between the distance and the preset sound effect distance. When the distance and/or the deviation angle of the target object and the curved TV are changed, the resolution, the offset rate and/or the audio track of the curved television playing screen are automatically adjusted, so that the information communication between the curved television and the user is realized, and the user is improved. The sense of presence of the movie.

Since the existing curved TV cannot adjust the resolution and angle of the video playback screen according to the user's position and visual angle.

Based on the above problems, the present invention provides a curved television video playing method.

1 is a schematic flow chart of a first embodiment of a method for playing a curved television video according to the present invention.

In an embodiment, the curved TV video playing method includes:

Step S10, detecting a distance and a deviation angle between the target object and the curved television;

In real life, the world that human beings perceive is three-dimensional. The picture and sound that humans perceive will change as the human position moves. According to the law of human body vision, when an object is closer to the human eye, the percentage of the object occupying the human eye is higher, and vice versa. When the user's visual direction is shifted to the left, it generally indicates that the user wants to pay more attention to the content on the left side of the visual image. At this time, if the details of the left content are displayed in more detail, the visual experience of the user is improved. Based on this, in order to improve the user's visual experience and adjust the screen and sound of the curved TV broadcast, it is necessary to detect the distance between the target object and the curved TV and the visual direction of the target object. The visual direction can be expressed by angle, specifically, the user's eyes The angle of deviation of the projected direction from the vertical line of the façade of the curved TV.

Referring to FIG. 2, FIG. 2 is a schematic diagram of a refinement process of an embodiment of step S10 in FIG.

Step S11, sending a test signal to the wireless earphone worn by the target object through the curved television, and receiving the feedback response signal and the visual angle information;

Step S12, calculating a total time that the curved television sends the test signal to receive the response signal;

Step S13, calculating the distance according to the total time and the speed of the test signal and the response signal transmission;

Step S14, calculating a deviation angle between the target object and the curved television according to the visual angle information and the television angle information of the curved television.

As shown in FIG. 3, FIG. 3 is a schematic diagram of a target object wearing a wireless earphone to watch a curved television; the position of the wireless headset can be used to indicate the location of the target object's eyes; and the curved television is sent to the wireless headset to send a test signal, which can be a human ear. The fixed frequency that cannot be perceived is X Hz ultrasonic wave, send a test signal every target time T (for example, 100ms or 500ms, etc.), and record the time when the test signal is transmitted is t0, because the ultrasonic wave will be attenuated during the transmission process, in order to ensure reliable test results Sex, the effective distance of the ultrasonic wave is specified as L, wherein the effective distance L ranges from L ∈ [0, 10] (m). Ultrasonic waves travel in the air at a speed of V m/ms (m/m), the maximum time that the ultrasonic wave is transmitted within the effective distance L T0 = 10/V Ms, in order to prevent mutual interference of signals, the target time T is specified to be greater than the maximum time T0; when the wireless earphone receives the test signal, the response signal is sent to the curved television through the wireless earphone, and the response signal may be electromagnetic waves, and the electromagnetic waves are in the air. The speed of propagation is C m/ms; and the wireless headset needs to consume time T1 from receiving the test signal to successfully transmitting the response signal, the time T1 can be determined by testing, or can be determined by recording the time when the wireless headset receives the test signal and sends the response signal; The time when the curved TV receives the response signal is t1; according to the relationship between speed, time and distance t1 - t0 = L1/V + T1 + L1/C, where L1 is the distance between the wireless headset and the curved TV, then the distance L1 = {c * v * [(t1-t0) - T1]} / (c + v). It is of course also possible to detect the distance of the target object to the curved TV by other electronically available devices, for example, detecting the distance of the target object to the curved television through a wearable device such as a wristband. The visual direction of the target object is perpendicular to the line connecting the two earphone heads of the wireless earphone. Therefore, the line perpendicular to the two earphone heads of the wireless earphone can be regarded as the visual direction of the target object; the electronic compass has the function of the compass, and the present invention In the embodiment, the orientation direction of the electronic compass is expressed by the deviation angle from the true north direction, and the deviation angle between the curved television and the true north direction is recorded as n1°, and the average of the deviation angles of the two earphone heads from the true north direction is targeted. The deviation angle between the visual direction of the object and the true north direction, and recording the deviation angle as n2°, the deviation angle of the visual direction of the target object from the curved television is n°=n2°-n1°.

Step S20, adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance;

In order to improve the user's sense of presence when watching video, it is usually recorded in the form of a special video stream during shooting, so that the special video stream has a higher resolution, and the vertical resolution is more than twice the resolution of the TV screen. The horizontal resolution reaches more than four times the resolution of the TV screen, as shown in FIG. 4, and FIG. 4 is a schematic diagram of the video stream and the curved TV playing screen. The audio corresponding to the special video stream has at least three audio tracks, and each audio track plays different sound effects, representing different sound effects at different distances from the main scene when shooting. Simply put, for the shooting of special video streams, one or more ultra-high resolution cameras are needed, and a scene is shot at a wide angle. When recording special video stream audio, multiple recording devices are placed according to different positions of the actual scene. Or use a computer to simulate the most realistic sound from a certain position of the focus as the audio track of different preset viewing distance. Adjusting the resolution of the surface television playback screen according to the relationship between the distance and the preset viewing distance, so that the closer the target object is to the curved television, the larger the content of the playback screen is displayed, and the farther the target object is from the curved television, in the playback screen. The more pictures displayed, the rules of human body vision, and the user's sense of presence. Of course, if the normal video stream is played, it may also be processed to set the proportion of the normal video stream according to the preset viewing distance, and the audio track corresponding to the normal video stream is simulated according to the preset viewing distance. Play audio tracks.

Referring to FIG. 5, FIG. 5 is a schematic diagram of a refinement process of an embodiment of step S20 in FIG.

Step S21, determining a vertical resolution of the play picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determining a horizontal resolution of the play picture according to a relationship between the horizontal resolution and the vertical resolution;

In step S22, the resolution of the curved television broadcast screen is adjusted according to the vertical resolution and the horizontal resolution of the playback screen.

When the surface TV plays the video stream, the resolution of the video stream picture is not displayed, but a part of the video stream picture is presented by zooming in and out and changing the scale mode. Assume that the default viewing distance (equivalent to the best viewing distance) of the default c-inch TV screen is L2 meters, let L2= c / 20, the preset viewing distance L2 corresponding to the common curved TV screen size is as shown in Table 1 below, the preset viewing distance L2 may be preset in the air conditioner factory, or the preset viewing distance L2 may be set by the user through the television remote control device, for example The preset viewing distance L2 is set to 2 meters or 3 meters.

Table 1 Preset viewing distance L2 corresponding to the surface of the curved TV screen

Curved TV screen size (inches)	Preset viewing distance L2 (m)
32	1.6
40	2.0
48	2.4
55	2.75
60	3.0
70	3.5

In order to ensure that the characters in the playback picture are not deformed, the scaling of the horizontal direction and the vertical direction remains unchanged when the image is zoomed, and when the scaling is determined, the corresponding scaling may be determined according to the vertical resolution or the horizontal resolution. The horizontal resolution or vertical resolution, and the relationship between the target object and the surface television distance L1 and the preset viewing distance L2 is preset with the vertical resolution m1 of the playback picture and the vertical resolution m2 of the video stream. Correlation is associated with a preset relationship in an embodiment of the present invention. M1 / m2 =1 - (2 * L2 - L1) / (2 * L2), where L1 = 2 * when L1 > 2 * L2 L2, the vertical resolution m1 of the playback picture can be calculated by the formula of the preset association relationship, and the horizontal resolution m3 of the playback picture is determined according to the relationship between the horizontal resolution m3 and the vertical resolution m1; according to the vertical of the playback picture Resolution m1 and horizontal resolution m3 adjust the resolution of the surface TV playback screen; the closer the target object is to the curved TV, the larger the content displayed in the playback screen, the farther the target object is from the curved TV, the screen displayed in the playback screen The more it conforms to the laws of human body vision, the more the user feels.

Step S30, adjusting an offset ratio of the playback screen according to the deviation angle;

When the user's visual direction is offset, for example, offset to the left, it generally indicates that the user wants to pay more attention to the content on the left side of the visual image. At this time, if the details of the left content are displayed in more detail, the user's visual experience is improved; and the user's visual direction is improved. The occurrence of the offset can be determined by the deviation angle of the target object from the curved television, and the offset ratio of the playback screen is adjusted according to the deviation angle.

Referring to FIG. 6, FIG. 6 is a schematic diagram of a refinement process of an embodiment of step S30 in FIG.

Step S31, determining an offset ratio of the playback screen according to the deviation angle, the horizontal resolution of the playback picture, and the horizontal resolution of the video code stream;

Step S32, adjusting an offset rate of the playback screen according to the offset rate.

The offset rate m4 of the playback picture is the distance between the horizontal midpoint of the curved TV playback picture and the horizontal midpoint of the actual picture of the code stream, expressed in units of pixels, and the offset rate m4 can be based on the deviation angle of the target object from the curved TV. The association relationship between the n°, the horizontal resolution m3 of the playback picture, and the horizontal resolution m5 of the video stream is calculated. The preset association relationship of an embodiment of the present invention is m4= [(m5 - m3) / 2 ] *(n° / 45°), where n° = 45°, let n° = 45°, the offset rate m4 of the play picture can be calculated by the formula of the above-mentioned preset relationship, wherein if m4 is a positive number, it means that the horizontal midpoint of the curved TV play picture is in the horizontal level of the actual picture of the code stream. Point m4 pixels to the right. If m4 is negative, it means that the horizontal midpoint of the surface TV playback picture is m4 pixels from the horizontal midpoint of the actual stream of the code stream; adjust the playback according to the calculated offset rate m4. The offset rate of the picture causes the user to shift the visual direction to see the details of the playback picture portion in more detail.

Step S40, adjusting the audio track played according to the relationship between the distance and the preset sound effect distance.

The audio corresponding to the special video stream has at least three audio tracks, each of which plays different sound effects, representing different sound effects at different distances from the main scene when shooting. Table 2 below shows three audio tracks. The relationship between audio and preset sound distance.

Table 2 Relationship between audio with three audio tracks and preset sound distance

Audio track name	Preset sound distance (m)
A1	[0,2]
A2	[2,3]
A3	[3,10]

Adjusting the audio playing track according to the relationship between the distance L1 of the target object and the curved TV and the preset sound effect distance, and the distance L1 is within the preset sound effect distance of the audio track, then the audio track is decoded and transmitted to The wireless earphone performs playback; for example, when the distance L1 is within the preset sound effect distance of the audio track A2, the audio track A2 is decoded and transmitted to the wireless earphone for playing; further, when the target object is moved through the position To change the range of the best sound effect distance between the target object and the curved TV distance L1, the audio track is switched by the track volume gradient; for example, when the target object is from the preset sound effect distance of the audio track A1 When moving to the preset sound effect distance of the audio track A2, the volume of the audio track A1 played from the wireless earphone is gradually reduced until no, and the volume of the audio track A2 is gradually increased until the normal level, so that the user The sound that is heard is a natural transition, seamless switching, and enhances the sense of presence.

In this embodiment, according to the change of the distance and/or the deviation angle of the target object and the curved television, the resolution, the offset rate and/or the audio track of the curved television playing screen are automatically adjusted, and the information interaction between the curved television and the user is realized. Improve the sense of presence of the user.

Referring to FIG. 7, FIG. 7 is a schematic flowchart diagram of a second embodiment of a method for playing a curved television video according to the present invention. Based on the first embodiment of the method for playing a curved television video, the method further includes:

In step S50, when the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or the deviation angle of the current detection and the deviation angle of the previous detection is greater than or equal to the preset value. When the angle value is used, the resolution and the offset rate of the current playback picture are kept unchanged;

Step S60, when the change value of the distance detected by the current detection and the previous detection distance is less than the preset distance value, and the variation angle of the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the present The distance and deviation angle of the secondary detection adjust the resolution and offset rate of the playback screen.

Since the user is watching the curved TV, there may be a short turn and other behaviors, for example, looking at the weather outside the window, taking things from the table, etc., the user quickly returns to the original position and posture, although the user does not need Adjusting the resolution, offset rate, etc. of the playback screen, but if the above behavior changes the distance and/or the deviation angle of the target object from the curved TV, it is likely that the resolution and/or the offset ratio change accordingly; In fact, even if the user actually changes the position and posture to watch the curved TV, the position and posture are usually maintained after changing the position and posture. Therefore, according to an embodiment of the present invention, the distance between the target object and the curved television is /. The process of continuously changing the deviation angle is regarded as the process of the user adjusting the position and posture. After the adjustment is completed, the resolution and/or the offset rate of the playback screen is adjusted according to the distance and/or the deviation angle of the target object from the curved television. That is, when the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or this time When the measured deviation angle and the deviation value of the previous detection deviation angle are greater than or equal to the preset angle value, the resolution and the offset rate of the current playback screen are kept unchanged; when the distance detected this time is the distance from the previous detection When the change value is smaller than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is smaller than the preset angle value, the resolution and offset of the playback screen are adjusted according to the distance and the deviation angle of the detection. Rate; the preset distance value and the preset angle value may be preset in the factory when the curved TV is shipped, or the preset distance value and the preset angle value may be set by the user through the television remote control device, for example, the preset distance value is 0.1 meter. Or 0.2 meters, etc., the preset angle value is 5° Or 10° Wait. Of course, it is also possible to change the time interval for adjusting the resolution and/or the offset rate of the curved television broadcast screen, for example, although the distance and deviation of the target object from the curved television are detected every target time T (for example, 100 ms or 500 ms, etc.). Angle, however, per interval target time T2 (T2 > T, for example, 500ms or 1000ms, etc.) adjusts the resolution and offset rate of the curved TV playback screen according to the distance and deviation angle of the target object and the curved TV that were acquired recently; when the user wants to move, the surface TV playback screen The resolution, the offset rate, and/or the audio track, etc., are adjusted accordingly, so that the target time T2 can be shortened, and even the target time T2 is the same as the target time T, so that the resolution and the shift rate of the curved television playback screen are obtained. Synchronization follows the change of the user's position; while increasing the target time T2, the user can not use the short-term action of adjusting the resolution and the offset rate of the curved TV screen to enhance the stability of the curved TV screen. Sex.

The invention does not use the process distance and deviation angle of the user to continuously change the resolution and the offset rate of the curved television playing screen, and enhances the stability of the curved television playing screen.

The invention further provides a curved TV video playing device.

Referring to FIG. 8, FIG. 8 is a schematic diagram of functional modules of a preferred embodiment of a curved television video playback apparatus according to the present invention.

In an embodiment, the curved TV video playback device comprises: a detection module 10 and an adjustment module 20.

The detecting module 10 is configured to detect a distance and a deviation angle between the target object and the curved television;

In real life, the world that human beings perceive is three-dimensional. The picture and sound that humans perceive will change as the human position moves. According to the law of human body vision, when an object is closer to the human eye, the percentage of the object occupying the human eye is higher, and vice versa. When the user's visual direction is shifted to the left, it generally indicates that the user wants to pay more attention to the content on the left side of the visual image. At this time, if the details of the left content are displayed in more detail, the visual experience of the user is improved. Based on this, in order to improve the user's visual experience and adjust the screen and sound of the curved TV broadcast, it is necessary to detect the distance between the target object and the curved TV and the visual direction of the target object. The visual direction can be expressed by angle, specifically, the user's eyes The angle of deviation of the projected direction from the vertical line of the façade of the curved TV.

Referring to FIG. 9, FIG. 9 is a schematic diagram of a refinement function module of an embodiment of the detection module 10 of FIG. The detection module 10 includes a signal unit 11 and a calculation unit 12.

The signal unit 11 is configured to send a test signal to the wireless headset worn by the target object through the curved television, and receive the feedback response signal and the visual angle information;

The calculating unit 12 is configured to calculate a total time that the curved television sends the test signal to receive the response signal; and

Calculating the distance according to the total time and the speed of the test signal and the response signal transmission; and

Calculating a deviation angle between the target object and the curved television according to the visual angle information and the television angle information of the curved television.

As shown in FIG. 3, FIG. 3 is a schematic diagram of a target object wearing a wireless earphone to watch a curved television; the position of the wireless headset can be used to indicate the location of the target object's eyes; and the curved television is sent to the wireless headset to send a test signal, which can be a human ear. The fixed frequency that cannot be perceived is X Hz ultrasonic wave, send a test signal every target time T (for example, 100ms or 500ms, etc.), and record the time when the test signal is transmitted is t0, because the ultrasonic wave will be attenuated during the transmission process, in order to ensure reliable test results Sex, the effective distance of the ultrasonic wave is specified as L, wherein the effective distance L ranges from L ∈ [0, 10] (m). Ultrasonic waves travel in the air at a speed of V m/ms (m/m), the maximum time that the ultrasonic wave is transmitted within the effective distance L T0 = 10/V Ms, in order to prevent mutual interference of signals, the target time T is specified to be greater than the maximum time T0; when the wireless earphone receives the test signal, the response signal is sent to the curved television through the wireless earphone, and the response signal may be electromagnetic waves, and the electromagnetic waves are in the air. The speed of propagation is C m/ms; and the wireless headset needs to consume time T1 from receiving the test signal to successfully transmitting the response signal, the time T1 can be determined by testing, or can be determined by recording the time when the wireless headset receives the test signal and sends the response signal; The time when the curved TV receives the response signal is t1; according to the relationship between speed, time and distance t1 - t0 = L1/V + T1 + L1/C, where L1 is the distance between the wireless headset and the curved TV, then the distance L1 = {c * v * [(t1-t0) - T1]} / (c + v). It is of course also possible to detect the distance of the target object to the curved TV by other electronically available devices, for example, detecting the distance of the target object to the curved television through a wearable device such as a wristband. The visual direction of the target object is perpendicular to the line connecting the two earphone heads of the wireless earphone. Therefore, the line perpendicular to the two earphone heads of the wireless earphone can be regarded as the visual direction of the target object; the electronic compass has the function of the compass, and the present invention In the embodiment, the orientation direction of the electronic compass is expressed by the deviation angle from the true north direction, and the deviation angle between the curved television and the true north direction is recorded as n1°, and the average of the deviation angles of the two earphone heads from the true north direction is targeted. The deviation angle between the visual direction of the object and the true north direction, and recording the deviation angle as n2°, the deviation angle of the visual direction of the target object from the curved television is n°=n2°-n1°.

The adjusting module 20 is configured to adjust a resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance;

In order to improve the user's sense of presence when watching video, it is usually recorded in the form of a special video stream during shooting, so that the special video stream has a higher resolution, and the vertical resolution is more than twice the resolution of the TV screen. The horizontal resolution reaches more than four times the resolution of the TV screen, as shown in FIG. 4, and FIG. 4 is a schematic diagram of the video stream and the curved TV playing screen. The audio corresponding to the special video stream has at least three audio tracks, and each audio track plays different sound effects, representing different sound effects at different distances from the main scene when shooting. Simply put, for the shooting of special video streams, one or more ultra-high resolution cameras are needed, and a scene is shot at a wide angle. When recording special video stream audio, multiple recording devices are placed according to different positions of the actual scene. Or use a computer to simulate the most realistic sound from a certain position of the focus as the audio track of different preset viewing distance. Adjusting the resolution of the surface television playback screen according to the relationship between the distance and the preset viewing distance, so that the closer the target object is to the curved television, the larger the content of the playback screen is displayed, and the farther the target object is from the curved television, in the playback screen. The more pictures displayed, the rules of human body vision, and the user's sense of presence. Of course, if the normal video stream is played, it may also be processed to set the proportion of the normal video stream according to the preset viewing distance, and the audio track corresponding to the normal video stream is simulated according to the preset viewing distance. Play audio tracks.

Referring to FIG. 10, FIG. 10 is a schematic diagram of a refinement function module of an embodiment of the adjustment module 20 of FIG. The adjustment module 20 includes a determining unit 21 and an adjusting unit 22.

The determining unit 21 is configured to determine a vertical resolution of the play picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determine a horizontal resolution of the play picture according to the relationship between the horizontal resolution and the vertical resolution. rate;

The adjusting unit 22 is configured to adjust the resolution of the curved television playing screen according to the vertical resolution and the horizontal resolution of the playing screen.

When the surface TV plays the video stream, the resolution of the video stream picture is not displayed, but a part of the video stream picture is presented by zooming in and out and changing the scale mode. Assume that the default viewing distance (equivalent to the best viewing distance) of the default c-inch TV screen is L2 meters, let L2= c / 20, the preset viewing distance L2 corresponding to the common curved TV screen size is as shown in Table 1 below, the preset viewing distance L2 may be preset in the air conditioner factory, or the preset viewing distance L2 may be set by the user through the television remote control device, for example The preset viewing distance L2 is set to 2 meters or 3 meters.

Table 1 Preset viewing distance L2 corresponding to the surface of the curved TV screen

Curved TV screen size (inches)	Preset viewing distance L2 (m)
32	1.6
40	2.0
48	2.4
55	2.75
60	3.0
70	3.5

In order to ensure that the characters in the playback picture are not deformed, the scaling of the horizontal direction and the vertical direction remains unchanged when the image is zoomed, and when the scaling is determined, the corresponding scaling may be determined according to the vertical resolution or the horizontal resolution. The horizontal resolution or vertical resolution, and the relationship between the target object and the surface television distance L1 and the preset viewing distance L2 is preset with the vertical resolution m1 of the playback picture and the vertical resolution m2 of the video stream. Correlation is associated with a preset relationship in an embodiment of the present invention. M1 / m2 =1 - (2 * L2 - L1) / (2 * L2), where L1 = 2 * when L1 > 2 * L2 L2, the vertical resolution m1 of the playback picture can be calculated by the formula of the preset association relationship, and the horizontal resolution m3 of the playback picture is determined according to the relationship between the horizontal resolution m3 and the vertical resolution m1; according to the vertical of the playback picture Resolution m1 and horizontal resolution m3 adjust the resolution of the surface TV playback screen; the closer the target object is to the curved TV, the larger the content displayed in the playback screen, the farther the target object is from the curved TV, the screen displayed in the playback screen The more it conforms to the laws of human body vision, the more the user feels.

The adjustment module 20 is further configured to adjust an offset rate of the play screen according to the deviation angle;

When the user's visual direction is offset, for example, offset to the left, it generally indicates that the user wants to pay more attention to the content on the left side of the visual image. At this time, if the details of the left content are displayed in more detail, the user's visual experience is improved; and the user's visual direction is improved. The offset can be determined by the deviation angle of the target object from the curved TV, and the offset ratio of the playback screen is adjusted according to the deviation angle.

Further, the determining unit 21 is further configured to determine an offset rate of the play picture according to the deviation angle, the horizontal resolution of the play picture, and the horizontal resolution of the video code stream;

The adjusting unit 22 is further configured to adjust an offset rate of the play picture according to the offset rate.

The adjustment module 20 is further configured to adjust an audio track played according to the relationship between the distance and the preset sound effect distance.

In this embodiment, according to the change of the distance and/or the deviation angle of the target object and the curved television, the resolution, the offset rate and/or the audio track of the curved television playing screen are automatically adjusted, and the information interaction between the curved television and the user is realized. Improve the sense of presence of the user.

Further, the adjusting module 20 is further configured to: when the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or the deviation angle of the current detection from the previous detection When the change value of the angle is greater than or equal to the preset angle value, the resolution and the offset rate of the current playback screen are kept unchanged;

When the distance between the detected distance and the previous detected distance is less than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the current detection The distance and deviation angle adjust the resolution and offset rate of the playback screen.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims (16)

1.  A curved television video playing method, comprising the following steps:

   Detecting the distance and deviation angle of the target object from the curved TV;

   Adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance; and

   Adjusting an offset ratio of the playback screen according to the deviation angle; and

   The audio track is adjusted according to the relationship between the distance and the preset sound effect distance.
2. The method of playing a curved television video according to claim 1, wherein the step of detecting a distance and a deviation angle of the target object from the curved television comprises:

   Sending a test signal to the wireless earphone worn by the target object through the curved television, and receiving the feedback response signal and the visual angle information;

   Calculating a total time that the surface television sends the test signal to receive the response signal;

   Calculating the distance according to the total time and the speed of the test signal and the response signal transmission;

   Calculating a deviation angle between the target object and the curved television according to the visual angle information and the television angle information of the curved television.
3. The method of playing a curved television video according to claim 2, wherein the step of adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance comprises:

   Determining a vertical resolution of the playback picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determining a horizontal resolution of the playback picture according to a relationship between the horizontal resolution and the vertical resolution;

   Adjust the resolution of the surface TV playback screen according to the vertical resolution and horizontal resolution of the playback screen.
4. The method of playing a curved television video according to claim 3, wherein the step of adjusting the offset rate of the playback screen according to the deviation angle comprises:

   Determining the offset rate of the playback screen according to the deviation angle, the horizontal resolution of the playback picture, and the horizontal resolution of the video stream;

   The offset rate of the playback picture is adjusted according to the offset rate.
5. The method of playing a curved television video according to claim 2, wherein the step of adjusting the resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance comprises:

   The closer the target object is to the curved TV, the larger the content displayed on the playback screen, and the farther the target object is from the curved TV, the more images are displayed in the playback screen.
6. The method of playing a curved television video according to claim 2, wherein the step of adjusting the audio track played according to the relationship between the distance and the preset sound effect distance comprises:

   When the range of the best sound effect distance between the target object and the curved TV is changed, the audio track is switched by the track volume gradient.
7. The method of playing a curved television video according to claim 1, wherein the method further comprises:

   When the distance between the detected distance and the previous detected distance is greater than or equal to the preset distance value, and/or the deviation angle of the current detection and the deviation angle of the previous detection is greater than or equal to the preset angle value, , keeping the resolution and offset rate of the current playback picture unchanged;

   When the distance between the detected distance and the previous detected distance is less than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the current detection The distance and deviation angle adjust the resolution and offset rate of the playback screen.
8. The method of playing a curved television video according to claim 1, wherein the method further comprises:

   Adjust the time interval of the resolution and/or offset rate of the surface TV playback screen.
9. A curved television video playing device, comprising:

   a detecting module, configured to detect a distance and a deviation angle of the target object from the curved television;

   The adjusting module is configured to adjust a resolution of the curved television playing screen according to the relationship between the distance and the preset viewing distance, adjust an offset rate of the playing screen according to the deviation angle, and a relationship between the distance and the preset sound effect distance according to the deviation angle Adjust the audio track for audio playback.
10. The curved television video playing device according to claim 9, wherein the detecting module comprises:

    a signal unit, configured to send a test signal to the wireless headset worn by the target object through the curved television, and receive the feedback response signal and the visual angle information;

    a calculating unit, configured to calculate a total time that the curved television sends the test signal to receive the response signal, calculate the distance according to the total time and a speed of the test signal and the response signal transmission, and according to the visual angle The TV angle information of the information and curved TV calculates the deviation angle between the target object and the curved TV.
11. The curved television video playback device of claim 10, wherein the adjustment module comprises:

    a determining unit, configured to determine a vertical resolution of the play picture according to the distance, a preset viewing distance, and a vertical resolution of the video code stream, and determine a horizontal resolution of the play picture according to a relationship between the horizontal resolution and the vertical resolution;

    The adjustment unit is configured to adjust the resolution of the surface television playback screen according to the vertical resolution and the horizontal resolution of the playback screen.
12. The curved television video playback device of claim 11, wherein the determining unit is further configured to determine an offset of the playback screen according to the deviation angle, the horizontal resolution of the playback picture, and the horizontal resolution of the video stream. rate;

    The adjusting unit is further configured to adjust an offset rate of the play picture according to the offset rate.
13. The curved television video playing device according to claim 10, wherein the adjusting module is further configured to make the target object closer to the curved television, and the content of the playing screen is displayed larger, and the target object is away from the curved television. Far, the more pictures are displayed on the playback screen.
14. The curved television video playing device of claim 10, wherein the adjusting module is further configured to use a track volume gradient when a range of the best sound effect distance between the target object and the curved television is changed. The way to audio track switching.
15. The curved television video playback device of claim 9, wherein the adjustment module is further configured to: when the distance detected by the current detection and the distance detected by the previous detection is greater than or equal to a preset distance value, and/ Or if the deviation angle of the current detection and the deviation angle of the previous detection are greater than or equal to the preset angle value, the resolution and the offset rate of the current playback screen are kept unchanged;

    When the distance between the detected distance and the previous detected distance is less than the preset distance value, and the deviation angle of the current detection and the deviation angle of the previous detection is less than the preset angle value, according to the current detection The distance and deviation angle adjust the resolution and offset rate of the playback screen.
16. The curved television video playing device according to claim 9, wherein the adjustment module is further configured to adjust a time interval of a resolution and/or an offset rate of the curved television playing screen.